Great work you're doing on the Surface Pro 3. I'm looking forward to some awesome OSX support and you're one of the people putting in the work to make that happen. Why is wifi support impossible on these units? See I'm perfectly ok if we don't get touch support....OSX really doesn't have any support for it anyway.
OS X does not have Kernel Extensions, KEXT, that support Marvell’s Avastar 88W8897 or really any Avastar at that. Until either Apple or someone else writes a KEXT that supports it we are out of luck. In most cases you would just swap out the WiFi module for something that is compatible, but seeing as this is a SoC that is soldered onto the board we will have to make use of external dongles for it to work. I'm currently using the Edimax EW-7811Un USB dongle.